Sub UpdateDocuments()
Application.ScreenUpdating = False
Dim strFolder As String, strFile As String, wdDoc As Document
strFolder = GetFolder
If strFolder = "" Then Exit Sub
strFile = Dir(strFolder & "\*.doc", vbNormal)
While strFile <> ""
  Set wdDoc = Documents.Open(FileName:=strFolder & "\" & strFile, AddToRecentFiles:=False, Visible:=False)
  With wdDoc
    With .Range
      With .Find
        .ClearFormatting
        .Replacement.ClearFormatting
        .Text = "Revision No."
        .Replacement.Text = ""
        .Forward = True
        .Format = False
        .Wrap = wdFindStop
      End With
      Do While .Find.Execute
        If .Information(wdWithInTable) = True Then .Cells(1).Next.Range.Text = "6"
        .Collapse wdCollapseEnd
      Loop
    End With
    .Close SaveChanges:=True
  End With
  strFile = Dir()
Wend
Set wdDoc = Nothing
Application.ScreenUpdating = True
End Sub
 
Function GetFolder() As String
Dim oFolder As Object
GetFolder = ""
Set oFolder = CreateObject("Shell.Application").BrowseForFolder(0, "Choose a folder", 0)
If (Not oFolder Is Nothing) Then GetFolder = oFolder.Items.Item.Path
Set oFolder = Nothing
End Function